| the ideal set up is one where you can get 25% of travel as sag (sorry i dont know ST travel) for solo and also loaded. the range of preload means its unlikely one spring will do it. i don't know length of st spring but as Shazaam says you can't just keep increasing preload , there will be a maximum the shock maker recomends. I run 2 springs on my 999, its only 4 bolts to pull a shock out so i swap the spring if i carry a pillion.
talk to a good tuner - K tech are showa importer and ask them which spring they suggest for your solo weight and then 2 up weight. you'll have some adjustment with preload as well. If you go ohlins dont get the hydro preload adjustor as i'm not certain you can swap springs without a compresion stand.
thats for rear only, forks are a tougher one but you have to remember you probably aren't going as quick with a pillion and yor riding style is different. If you want 1 bike to do it all inevitably its a compromised set-up |